It was first mentioned in Marvel Comics in a story scripted by writer Roy Thomas and drawn by Barry Windsor-Smith and Syd Shores in The Avengers #66 (July 1969).
It was a small slug of adamantium, the toughest and hardest of all metals..." Adamant and the literary form adamantine occur in works such as The Faerie Queene, Paradise Lost, Gulliver's Travels, The Adventures of Tom Sawyer, The Lord of the Rings,[4] and the film Forbidden Planet (as "adamantine steel").
Marvel Comics' adamantium has an extremely stable molecular structure that prevents it from being further molded even if the temperature is high enough to keep it in its liquefied form.
In its solid form, It is near-impossible to destroy or fracture in this state, and when molded to a sharp edge, can penetrate most lesser materials with minimal force.
[7] The Marvel Comics character Wolverine discovers an adamantium-laced skull in the villain Apocalypse's laboratory and says it seems to have been there for "eons".
[17][18] Appearances of secondary adamantium in Marvel comic books include the casing of the supercomputer F.A.U.S.T.,[19] a suit constructed by F.A.U.S.T.